public class Test {
    public static void main(String[] args) {
        Integer a= 200;
        Integer b = 200;
        System.out.println(a);
        System.out.println(b);
        System.out.println(a==b);
    }

    public static void main2(String[] args) {
        Integer a = 10;
        int i = a;
        System.out.println(i);

        int aa = a.intValue();
        double d = a.doubleValue();
        System.out.println(aa);
        System.out.println(d);
    }
    public static void main1(String[] args){
        Integer a = 10;
        int i = 99;
        Integer b = i;

        System.out.println(a);
        System.out.println(b);

        Integer aa = Integer.valueOf(10);
        System.out.println(aa);
    }
}

